Mahoning County, OH - 2026 Building Permit Guide

Permit Authority

Mahoning County Building Inspection is the building permit authority for unincorporated areas under county certification. County application forms require applicants to first obtain the applicable zoning permit from the township, city, or village, so zoning remains local while county handles building code plan approval and inspections.

Department

Mahoning County Building Inspection Department

Address

50 Westchester Drive, Room 201, Austintown, OH 44515

Phone

(330) 270-2894

Email

buildingdepartment@mahoningcountyoh.gov

Website

https://www.mahoningcountyoh.gov/530/Building-Inspection

Online Permit Portal

Application Process

1. Determine the exact job site township and obtain the local zoning permit from the applicable township, city, or village.
2. Gather prerequisite agency approvals as applicable, including floodplain approval, sanitary or septic permit, downspout permit, and any sewer tap approvals.
3. Submit the appropriate Mahoning County application. Residential applications require two sets of plans. Commercial applications require a completed commercial application, initial non-refundable fee, exact address and township, zoning permit, sewer and health approvals, subcontractor names, and four sealed plan sets.
4. Pay the non-refundable processing fee and any other required fees.
5. Await plan review. Residential review usually takes 1-2 working days; commercial review averages 3 weeks if submittals are complete.
6. After permit issuance, request inspections when work is ready. A certificate of occupancy or use is issued where required upon completion.

Typical processing time: Residential plan review: usually 1-2 working days. Commercial plan approval: averages 3 weeks.

Source: Mahoning County Building Inspection Department

General Requirements

Any owner or authorized agent intending to construct, install, enlarge, alter, repair, move, or change occupancy of a building or structure, or to install or replace regulated electrical, gas, mechanical, or plumbing systems, must apply to the Chief Building Official and obtain approval and a building permit.

Required Documents

• Applicable zoning, sanitary, septic or downspout, SWPP, and floodplain permit numbers
• Project details
• Owner and contractor details
• Residential: two sets of drawings
• Commercial: site plan, sewer and health approvals, floodplain approval where applicable, subcontractor names, four sealed plan sets

Permit validity

County building permit remains valid under the condition that all supporting permits and approvals remain valid.

Building code

2024 Ohio Building Code and 2019 Ohio Residential Code with amendments.

Owner-builder

County recognizes a homeowner exemption for a bona fide owner-occupant of a single family dwelling performing work on the owner's established residence, subject to registration, testing for certain trades, and county requirements.

Contractor requirements

Mahoning County does not require a general contractor license for builders. Residential HVAC, electrical, hydronics, and refrigeration contractors must be licensed by Mahoning County. Commercial HVAC, electrical, hydronics, and refrigeration contractors must be state licensed and county registered. Plumbing registration is handled separately by the Mahoning County Board of Health.

Fees

Minimum permit fee

Residential permit fee: $2.50 per $1,000 of CCIM plus $10 flat fee. Minor permits (roofing, siding, windows): $100. Commercial initial processing fee: $125.

Plan check fee

Commercial plan review minimums: generally $90-$180, with $4 per 100 square feet on projects over 100 square feet. Flat fees apply to some permit categories.

Permit fee formula

CCIM formula using affected gross building area times square foot construction cost times base rate of 0.0025, plus processing, plan review, and state assessment fees where applicable.

Reinspection fee

Residential: $25; commercial: $50; after-hours special inspections: $112.50

Penalty (no permit)

Permit extension: $50. Occupancy before certificate of occupancy: $100. Work started without approval or permit: 200% of permit fee plus permit fee.

Payment note

Fees must be paid in full before permit issuance. County ePayment available online for processed items. Refunds are limited and state assessment fees are not refundable once processed.

Fees change. Verify current amounts at the official fee schedule.

Work That Does NOT Require a Permit

Contact the Mahoning County Building Inspection Department to confirm whether your project requires a permit before starting work.

Inspections

How to Schedule

• Mahoning County Building Inspection (330) 270-2894 (phone)

Scheduling deadline

Requests must be made no later than 9:00 a.m. of the desired inspection day.

Inspection hours

Inspections conducted between 9:00 a.m. and 4:30 p.m. on weekdays.

Time windows

9:00 a.m. to 4:30 p.m. weekdays. After-hours inspections available subject to availability and added fee.

Typical inspection sequence: Permit issuance, required phase inspections by county or related inspection agencies, then certificate of occupancy or use where applicable.

Additional Resources

• Building code: 2024 Ohio Building Code and 2019 Ohio Residential Code with amendments.
• Verify contractor license: Ohio eLicense Contractor Lookup
• Building Regulations
• Building Department Fee Schedule
• Residential Permitting Process
• Commercial Permitting Process
• License lookup guide: Ohio Contractor License Requirements
• Contract template: Ohio Homeowner-Contractor Agreement
• Ohio hub: Ohio Contractor License & Permit Hub

Frequently Asked Questions

Mahoning County Building Permit FAQ

Do I need a building permit in unincorporated Mahoning County, OH?

Any owner or authorized agent intending to construct, install, enlarge, alter, repair, move, or change occupancy of a building or structure, or to install or replace regulated electrical, gas, mechanical, or plumbing systems, must apply to the Chief Building Official and obtain approval and a building permit.

How much does a building permit cost in unincorporated Mahoning County, OH?

The minimum permit fee is Residential permit fee: $2.50 per $1,000 of CCIM plus $10 flat fee. Minor permits (roofing, siding, windows): $100. Commercial initial processing fee: $125.. Fees are calculated as: CCIM formula using affected gross building area times square foot construction cost times base rate of 0.0025, plus processing, plan review, and state assessment fees where applicable.. Plan check fee: Commercial plan review minimums: generally $90-$180, with $4 per 100 square feet on projects over 100 square feet. Flat fees apply to some permit categories..

How do I apply for a building permit in unincorporated Mahoning County, OH?

1. Determine the exact job site township and obtain the local zoning permit from the applicable township, city, or village. 2. Gather prerequisite agency approvals as applicable, including floodplain approval, sanitary or septic permit, downspout permit, and any sewer tap approvals. 3. Submit the appropriate Mahoning County application. Residential applications require two sets of plans. Commercial applications require a completed commercial application, initial non-refundable fee, exact address and township, zoning permit, sewer and health approvals, subcontractor names, and four sealed plan sets. 4. Pay the non-refundable processing fee and any other required fees. 5. Await plan review. Residential review usually takes 1-2 working days; commercial review averages 3 weeks if submittals are complete. 6. After permit issuance, request inspections when work is ready. A certificate of occupancy or use is issued where required upon completion.

How long does it take to get a building permit in unincorporated Mahoning County, OH?

Typical processing time is Residential plan review: usually 1-2 working days. Commercial plan approval: averages 3 weeks..

How do I schedule a building inspection in unincorporated Mahoning County, OH?

Inspections can be scheduled via: Mahoning County Building Inspection (330) 270-2894. Requests must be made no later than 9:00 a.m. of the desired inspection day..